[feat] add mobile update badges and iOS simulator support

2026-10-20 11:06:46 +08:00 · 2026-10-04 01:38:08 +08:00
parent 115533cd62
commit b8f704abb9
25 changed files with 766 additions and 61 deletions
@@ -0,0 +1,78 @@
+import Foundation
+import Combine
+
+/// Main-thread local-app checks triggered by visits, session endings and manual requests.
+final class AppUpdateChecker: ObservableObject {
+    enum Status { case idle, checking, upToDate, available, failed }
+    // Fetchers complete asynchronously on the main thread.
+    typealias Fetch = (@escaping (Data?) -> Void) -> (() -> Void)
+    @Published private(set) var status: Status = .idle
+    @Published private(set) var availableVersion = ""
+    var updateAvailable: Bool { !availableVersion.isEmpty }
+    let currentVersion: String
+
+    private let fetch: Fetch
+    private let compare: (String, Data) -> String?
+    private var enabled = false
+    private var generation = UUID()
+    private var cancelRequest: (() -> Void)?
+
+    init(currentVersion: String = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "",
+         fetch: @escaping Fetch = AppUpdateChecker.fetchRelease,
+         compare: @escaping (String, Data) -> String? = CrossDeskRTCBridge.checkMobileUpdate) {
+        self.currentVersion = currentVersion
+        self.fetch = fetch
+        self.compare = compare
+    }
+
+    deinit {
+        cancelRequest?()
+    }
+
+    func setEnabled(_ value: Bool) {
+        guard enabled != value else { return }
+        enabled = value
+        if enabled { checkNow(); return }
+        generation = UUID()
+        cancelRequest?()
+        cancelRequest = nil
+        if status == .checking {
+            status = updateAvailable ? .available : .idle
+        }
+    }
+
+    func checkNow() {
+        guard enabled, status != .checking else { return }
+        status = .checking
+        let token = UUID()
+        generation = token
+        cancelRequest = fetch { [weak self] data in
+            guard let self, self.enabled, self.generation == token else { return }
+            self.cancelRequest = nil
+            if let data, let result = self.compare(self.currentVersion, data) {
+                self.availableVersion = result
+                self.status = self.updateAvailable ? .available : .upToDate
+            } else {
+                self.status = .failed
+            }
+        }
+    }
+
+    // Public metadata only: no identity, installed version or credentials sent.
+    private static func fetchRelease(completion: @escaping (Data?) -> Void) -> (() -> Void) {
+        let configuration = URLSessionConfiguration.ephemeral
+        configuration.timeoutIntervalForRequest = 10
+        configuration.timeoutIntervalForResource = 15
+        let session = URLSession(configuration: configuration)
+        let request = URLRequest(url: URL(string: "https://version.crossdesk.cn/version.json")!,
+                                 cachePolicy: .reloadIgnoringLocalCacheData)
+        let task = session.dataTask(with: request) { data, response, error in
+            let valid = error == nil && (response as? HTTPURLResponse)?.statusCode == 200 &&
+                (data?.count ?? 0) <= 256 * 1024
+            DispatchQueue.main.async { completion(valid ? data : nil) }
+            session.finishTasksAndInvalidate()
+        }
+        task.resume()
+        return { task.cancel(); session.invalidateAndCancel() }
+    }
+}